Internal combustion motor



Oct. 12, 1943. v KELLER 2,331,784

INTERNAL COMBUSTION MOTOR Filed Dec. 5, 1942 4 Sheets-Sheet l Inventm B@Mm WWI/20% lfMg Oct. 12, 1943.

V. J. KELLER INTERNAL COMBUSTION MOTOR Filed Dec. 3, 1942 4 Sheets-Sheet2 Inventor Vz'wcen)? J Kell Oct. 12, 1943. v. J. KELLER INTERNALCOMBUSTION MOTOR 4 Sheets-Sheet 3 Inventor Filed Dec. 3, 1942 Kiwcemz".I/feZZer BIS Oct. 12,1943. v. J. KELLER INTERNAL COMBUSTION MOTOR FiledDec. 3, 1942 4 Sheets-Sheet 4 T m m w I l wwemi J/7ZZer WWW E PatentedOct. 12, 1943 UNITED STATES PATENT OFFICE INTERNAL COMBUSTION MOTORVincent J. Keller, Davenport, Iowa Application December 3, 1942, SerialNo. 467,772

1 Claim.

The present invention relates to new and useful improvements in internalcombustion engines and constitutes an improvement of my prior Patent No.2,252,512 dated August 12, 1941.

An object of the present invention is to provide means for compressingthe fuel and injecting the same into the combustion chamber of thecylinder whereby to improve the efficiency and economy of the motor.

A further object is to provide a device of this character of simple andpractical construction, which is efficient and reliable in performance,relatively inexpensive to manufacture and otherwise well adapted for thepurposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout and in which:

Figure 1 is a side elevational view of the motor.

Figure 2 is a top plan view with the head removed.

Figure 3 is an end elevational View with parts broken away and shown insection.

Figure 4 is a vertical transverse sectional View, and

Figure 5 is a fragmentary sectional view through one of the combustioncylinders.

Referring now to the drawings in detail wherein for the purpose ofillustration I have disclosed a preferred embodiment of the invention,the numeral 5 designates the crankcase in which the crankshaft isjournaled and a plurality of cylinders I extend upwardly from thecrankcasejeach cylinder having an elongated piston 4 working thereinprovided with the upper and lower piston rings 9 and I0, respectively.The pistons are connected with the cranks of the crankshafts by theconnecting rods H.

Adjacent each of the cylinders l is a fuel injection cylinder I2 havinga piston l3 working therein and which is connected to a crankshaft l4 bymeans of a connecting rod [5. The crankshaft M is driven from thecrankshaft 6 by means of a chain drive [6.

The carburetor of conventional construction is shown at I! having thefuel line l8 leading thereto, the carburetor supplying vaporized fuel toan intake manifold 19 which is connected to the respective heads 20secured on top of the injection cylinders l2.

A passage 2| affords communication between the manifold 20 and each ofthe injection cylinders l2, the passage 2| being controlled by a checkvalve 22 mounted in a guide 23 in the passage, the valve being normallyclosed by a spring 24 and arranged to be opened by the suction stroke ofthe piston I3.

The head 20 is also formed with a discharge passage 25 also having acheck valve 26 positioned. therein of a construction similar to thevalve 22 and arranged to be opened upon the compression. stroke of thepiston l3.

The passage 25 communicates with a manifold 21 connected to anintermediate portion of the cylinder 1 by means of ports 28, themanifold 21 extending longitudinally of the bank of cylinders along oneside of the engine.

Extending longitudinally along a relatively opposite side of the engineis an exhaust manifold 29 which communicates with the cylinder 1 bymeans of a port 30.

A fan or impellor casing 3| is supported at one end of the motor andcontains the fan or impellor 32 which is attached to one end of thecrankshaft 6 through a suitable gear connection (not shown).

The casing 3| is provided with a centrally arranged air inlet member 33and an exhaust passage 34 communicating with the manifold 21 as well aswith the intake manifold I9.

The intake and exhaust ports are arranged to permit the latter to openat approximately of the completion of the combustion stroke of the mainpiston 8 and at approximately of the completion of the combustion strokethe intake ports open to admit air and fuel vapor from the injectorcylinder and air from the manifold 21.

The air impellor 32 provides air pressure in the manifold l9 of theinjector cylinder as well as in the manifold 21 of the combustioncylinder.

The mixture of fuel vapor from the carburetor and air is compressed inthe injector cylinder and in the passage leading to the compressioncylinder when the piston I3 reaches its compression stroke and as soonas the piston 8 moves downwardly to open the intake ports the compressedfuel as well as air from the manifold .21 are simultaneously admitted tothe compression cylinder.

The pistons 8 and I3 are arranged for opposite actuation so that thepiston I3 is moving in its compression stroke during the suction strokeof the piston 8.

It is believed the details of construction, opera tion and manner of useof the device will be readily understood from the foregoing withoutfurther detailed explanation.

Having described the invention, what is claimed as new is:

In a motor of the class described, a crankshaft, a combustion cylinderhaving a piston working therein and connected to the crankshaft, intakeand exhaust ports in the side of the cylinder, an injector cylinderhaving a piston working therein, means operatively connecting saidlast-named piston to the crankshaft, an intake manifold for thecombustion cylinder, a. passage connecting 10 the injector cylinder withthe combustion cylinder, a check valve therein, an intake manifold forthe injector cylinder, means common to both manifolds for feeding airunder pressure thereto, a check valve in the intake manifold for theinjector cylinder, and a carburetor connected to the manifold for theinjector cylinder at a point between the air feeding means and thelastnamed cylinder.

VINCENT-T. KELLER.

